Desk fan



FIG. 1 is a front elevational view of a desk fan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in FIGS. 5 and 6 depict the parts of the desk fan with ribs that form no part of the claim. 

CLAIM The ornamental design for a desk fan, as shown and described. 